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<div class="titlepage"><div><div><h5 class="title">
<a name="geometry.reference.algorithms.assign.assign_points"></a><a class="link" href="assign_points.html" title="assign_points">assign_points</a>
</h5></div></div></div>
<p>
            <a class="indexterm" name="idm45246449937216"></a>
Assign a range of points to a linestring, ring or polygon.
          </p>
<h6>
<a name="geometry.reference.algorithms.assign.assign_points.h0"></a>
            <span class="phrase"><a name="geometry.reference.algorithms.assign.assign_points.synopsis"></a></span><a class="link" href="assign_points.html#geometry.reference.algorithms.assign.assign_points.synopsis">Synopsis</a>
          </h6>
<p>
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Geometry</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Range</span><span class="special">&gt;</span>
<span class="keyword">void</span> <span class="identifier">assign_points</span><span class="special">(</span><span class="identifier">Geometry</span> <span class="special">&amp;</span> <span class="identifier">geometry</span><span class="special">,</span> <span class="identifier">Range</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">range</span><span class="special">)</span></pre>
<p>
          </p>
<h6>
<a name="geometry.reference.algorithms.assign.assign_points.h1"></a>
            <span class="phrase"><a name="geometry.reference.algorithms.assign.assign_points.parameters"></a></span><a class="link" href="assign_points.html#geometry.reference.algorithms.assign.assign_points.parameters">Parameters</a>
          </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                    <p>
                      Type
                    </p>
                  </th>
<th>
                    <p>
                      Concept
                    </p>
                  </th>
<th>
                    <p>
                      Name
                    </p>
                  </th>
<th>
                    <p>
                      Description
                    </p>
                  </th>
</tr></thead>
<tbody>
<tr>
<td>
                    <p>
                      Geometry &amp;
                    </p>
                  </td>
<td>
                    <p>
                      Any type fulfilling a Geometry Concept
                    </p>
                  </td>
<td>
                    <p>
                      geometry
                    </p>
                  </td>
<td>
                    <p>
                      A model of the specified concept
                    </p>
                  </td>
</tr>
<tr>
<td>
                    <p>
                      Range const &amp;
                    </p>
                  </td>
<td>
                    <p>
                      Any type fulfilling a Range Concept where it range_value type
                      fulfills the Point Concept
                    </p>
                  </td>
<td>
                    <p>
                      range
                    </p>
                  </td>
<td>
                    <p>
                      A range containg points fulfilling range and point concepts
                    </p>
                  </td>
</tr>
</tbody>
</table></div>
<h6>
<a name="geometry.reference.algorithms.assign.assign_points.h2"></a>
            <span class="phrase"><a name="geometry.reference.algorithms.assign.assign_points.header"></a></span><a class="link" href="assign_points.html#geometry.reference.algorithms.assign.assign_points.header">Header</a>
          </h6>
<p>
            Either
          </p>
<p>
            <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
          </p>
<p>
            Or
          </p>
<p>
            <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">algorithms</span><span class="special">/</span><span class="identifier">assign</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
          </p>
<h6>
<a name="geometry.reference.algorithms.assign.assign_points.h3"></a>
            <span class="phrase"><a name="geometry.reference.algorithms.assign.assign_points.notes"></a></span><a class="link" href="assign_points.html#geometry.reference.algorithms.assign.assign_points.notes">Notes</a>
          </h6>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>
              Assign automatically clears the geometry before assigning (use append
              if you don't want that)
            </p></td></tr>
</table></div>
<h6>
<a name="geometry.reference.algorithms.assign.assign_points.h4"></a>
            <span class="phrase"><a name="geometry.reference.algorithms.assign.assign_points.example"></a></span><a class="link" href="assign_points.html#geometry.reference.algorithms.assign.assign_points.example">Example</a>
          </h6>
<p>
            Shows usage of Boost.Geometry's assign, Boost.Assign, and Boost.Range
            to assign ranges of a linestring
          </p>
<p>
</p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>

<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">linestring</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">adapted</span><span class="special">/</span><span class="identifier">boost_tuple</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>

<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">assign</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">adapted</span><span class="special">/</span><span class="identifier">boost_range</span><span class="special">/</span><span class="identifier">filtered</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>

<span class="identifier">BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS</span><span class="special">(</span><span class="identifier">cs</span><span class="special">::</span><span class="identifier">cartesian</span><span class="special">)</span>

<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">x_between</span>
<span class="special">{</span>
    <span class="identifier">x_between</span><span class="special">(</span><span class="identifier">T</span> <span class="identifier">a</span><span class="special">,</span> <span class="identifier">T</span> <span class="identifier">b</span><span class="special">)</span>
        <span class="special">:</span> <span class="identifier">fa</span><span class="special">(</span><span class="identifier">a</span><span class="special">),</span> <span class="identifier">fb</span><span class="special">(</span><span class="identifier">b</span><span class="special">)</span>
    <span class="special">{}</span>

    <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">P</span><span class="special">&gt;</span>
    <span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">P</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">p</span><span class="special">)</span> <span class="keyword">const</span>
    <span class="special">{</span>
        <span class="keyword">return</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">get</span><span class="special">&lt;</span><span class="number">0</span><span class="special">&gt;(</span><span class="identifier">p</span><span class="special">)</span> <span class="special">&gt;=</span> <span class="identifier">fa</span>
            <span class="special">&amp;&amp;</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">get</span><span class="special">&lt;</span><span class="number">0</span><span class="special">&gt;(</span><span class="identifier">p</span><span class="special">)</span> <span class="special">&lt;=</span> <span class="identifier">fb</span><span class="special">;</span>
    <span class="special">}</span>
<span class="keyword">private</span> <span class="special">:</span>
    <span class="identifier">T</span> <span class="identifier">fa</span><span class="special">,</span> <span class="identifier">fb</span><span class="special">;</span>
<span class="special">};</span>


<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
<span class="special">{</span>
    <span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">assign</span><span class="special">;</span>

    <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">linestring</span><span class="special">&lt;</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">tuple</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span> <span class="special">&gt;</span> <span class="identifier">ls</span><span class="special">;</span>

    <span class="identifier">ls</span> <span class="identifier">line1</span><span class="special">,</span> <span class="identifier">line2</span><span class="special">,</span> <span class="identifier">line3</span><span class="special">;</span>

    <span class="identifier">line1</span> <span class="special">=</span> <span class="identifier">tuple_list_of</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">)(</span><span class="number">2</span><span class="special">,</span> <span class="number">3</span><span class="special">)(</span><span class="number">4</span><span class="special">,</span> <span class="number">0</span><span class="special">)(</span><span class="number">6</span><span class="special">,</span> <span class="number">3</span><span class="special">)(</span><span class="number">8</span><span class="special">,</span> <span class="number">0</span><span class="special">)(</span><span class="number">10</span><span class="special">,</span> <span class="number">3</span><span class="special">)(</span><span class="number">12</span><span class="special">,</span> <span class="number">0</span><span class="special">);</span> <a class="co" name="geometry.reference.algorithms.assign.assign_points.c0" href="assign_points.html#geometry.reference.algorithms.assign.assign_points.c1"><img src="../../../../../../../../doc/src/images/callouts/1.png" alt="1" border="0"></a>
    <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">assign_points</span><span class="special">(</span><span class="identifier">line2</span><span class="special">,</span> <span class="identifier">tuple_list_of</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">)(</span><span class="number">2</span><span class="special">,</span> <span class="number">2</span><span class="special">)(</span><span class="number">4</span><span class="special">,</span> <span class="number">0</span><span class="special">)(</span><span class="number">6</span><span class="special">,</span> <span class="number">2</span><span class="special">)(</span><span class="number">8</span><span class="special">,</span> <span class="number">0</span><span class="special">));</span> <a class="co" name="geometry.reference.algorithms.assign.assign_points.c2" href="assign_points.html#geometry.reference.algorithms.assign.assign_points.c3"><img src="../../../../../../../../doc/src/images/callouts/2.png" alt="2" border="0"></a>
    <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">assign_points</span><span class="special">(</span><span class="identifier">line3</span><span class="special">,</span> <span class="identifier">line1</span> <span class="special">|</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">adaptors</span><span class="special">::</span><span class="identifier">filtered</span><span class="special">(</span><span class="identifier">x_between</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;(</span><span class="number">4</span><span class="special">,</span> <span class="number">8</span><span class="special">)));</span> <a class="co" name="geometry.reference.algorithms.assign.assign_points.c4" href="assign_points.html#geometry.reference.algorithms.assign.assign_points.c5"><img src="../../../../../../../../doc/src/images/callouts/3.png" alt="3" border="0"></a>

    <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"line 1: "</span> <span class="special">&lt;&lt;</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">dsv</span><span class="special">(</span><span class="identifier">line1</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"line 2: "</span> <span class="special">&lt;&lt;</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">dsv</span><span class="special">(</span><span class="identifier">line2</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"line 3: "</span> <span class="special">&lt;&lt;</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">::</span><span class="identifier">dsv</span><span class="special">(</span><span class="identifier">line3</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>

    <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
<span class="special">}</span>
</pre>
<p>
          </p>
<div class="calloutlist"><table border="0" summary="Callout list">
<tr>
<td width="5%" valign="top" align="left"><p><a name="geometry.reference.algorithms.assign.assign_points.c1"></a><a href="#geometry.reference.algorithms.assign.assign_points.c0"><img src="../../../../../../../../doc/src/images/callouts/1.png" alt="1" border="0"></a> </p></td>
<td valign="top" align="left"><p>
                tuple_list_of is part of Boost.Assign and can be used for Boost.Geometry
                if points are tuples
              </p></td>
</tr>
<tr>
<td width="5%" valign="top" align="left"><p><a name="geometry.reference.algorithms.assign.assign_points.c3"></a><a href="#geometry.reference.algorithms.assign.assign_points.c2"><img src="../../../../../../../../doc/src/images/callouts/2.png" alt="2" border="0"></a> </p></td>
<td valign="top" align="left"><p>
                tuple_list_of delivers a range and can therefore be used in boost::geometry::assign
              </p></td>
</tr>
<tr>
<td width="5%" valign="top" align="left"><p><a name="geometry.reference.algorithms.assign.assign_points.c5"></a><a href="#geometry.reference.algorithms.assign.assign_points.c4"><img src="../../../../../../../../doc/src/images/callouts/3.png" alt="3" border="0"></a> </p></td>
<td valign="top" align="left"><p>
                Boost.Range adaptors can also be used in boost::geometry::assign
              </p></td>
</tr>
</table></div>
<p>
            Output:
          </p>
<pre class="programlisting">line 1: ((0, 0), (2, 3), (4, 0), (6, 3), (8, 0), (10, 3), (12, 0))
line 2: ((0, 0), (2, 2), (4, 0), (6, 2), (8, 0))
line 3: ((4, 0), (6, 3), (8, 0))
</pre>
<h6>
<a name="geometry.reference.algorithms.assign.assign_points.h5"></a>
            <span class="phrase"><a name="geometry.reference.algorithms.assign.assign_points.see_also"></a></span><a class="link" href="assign_points.html#geometry.reference.algorithms.assign.assign_points.see_also">See
            also</a>
          </h6>
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      Bruno Lalande, Mateusz Loskot, Adam Wulkiewicz, Oracle and/or its affiliates<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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